HEFTY DIE SPRINGS are heavy duty metal compression springs manufactured using round wire, specifically designed to be used as Die Springs or as heavy duty coil springs in any high stress, heavy load application. Lee HEFTY Die Springs are generally priced at 13 to 12 less than the cost of comparable rectangular wire springs, offering users a distinct value advantage. In independent testing conducted by the Institute of Spring Technology, Lee Spring's HEFTY Die Springs demonstrate a life-expectancy equal to traditional rectangular wire Die Springs. The Institute of Spring Technology (IST) is the UK based unique centre of excellence for all kinds of spring research, offering a wide range of services to the spring industry covering all aspects of springs, spring technology, and testing.

HEFTY DIE SPRINGS are heavy duty metal compression springs manufactured using round wire, specifically designed to be used as Die Springs or as heavy duty coil springs in any high stress, heavy load application. Lee HEFTY Die Springs are generally priced at 13 to 12 less than the cost of comparable rectangular wire springs, offering users a distinct value advantage. In independent testing conducted by the Institute of Spring Technology, Lee Spring's HEFTY Die Springs demonstrate a life-expectancy equal to traditional rectangular wire Die Springs. The Institute of Spring Technology (IST) is the UK based unique centre of excellence for all kinds of spring research, offering a wide range of services to the spring industry covering all aspects of springs, spring technology, and testing.